WO2017145712A1 - 圧縮機及び熱サイクルシステム - Google Patents
圧縮機及び熱サイクルシステム Download PDFInfo
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- WO2017145712A1 WO2017145712A1 PCT/JP2017/004057 JP2017004057W WO2017145712A1 WO 2017145712 A1 WO2017145712 A1 WO 2017145712A1 JP 2017004057 W JP2017004057 W JP 2017004057W WO 2017145712 A1 WO2017145712 A1 WO 2017145712A1
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- WIPO (PCT)
- Prior art keywords
- hfo
- working medium
- sealed container
- hfc
- mass
- Prior art date
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
- H02K5/136—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas explosion-proof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/02—Lubrication
- F04B39/0223—Lubrication characterised by the compressor type
- F04B39/023—Hermetic compressors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
- F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/02—Lubrication
- F04B39/0284—Constructional details, e.g. reservoirs in the casing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
- F04B39/121—Casings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/10—Other safety measures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
- F04C18/0207—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
- F04C18/0215—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form where only one member is moving
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
- F04C23/008—Hermetic pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/0042—Driving elements, brakes, couplings, transmissions specially adapted for pumps
- F04C29/0085—Prime movers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/02—Lubrication; Lubricant separation
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
- H02K5/225—Terminal boxes or connection arrangements
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2210/00—Fluid
- F04C2210/26—Refrigerants with particular properties, e.g. HFC-134a
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2210/00—Fluid
- F04C2210/26—Refrigerants with particular properties, e.g. HFC-134a
- F04C2210/263—HFO1234YF
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/30—Casings or housings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/40—Electric motor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/80—Other components
- F04C2240/803—Electric connectors or cables; Fittings therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/80—Other components
- F04C2240/809—Lubricant sump
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2270/00—Control; Monitoring or safety arrangements
- F04C2270/70—Safety, emergency conditions or requirements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/12—Inflammable refrigerants
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/06—Damage
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B31/00—Compressor arrangements
- F25B31/02—Compressor arrangements of motor-compressor units
- F25B31/026—Compressor arrangements of motor-compressor units with compressor of rotary type
Definitions
- the present invention relates to a compressor and a heat cycle system.
- CFC chlorofluorocarbons
- HCFC hydrochlorofluorocarbons
- HFC difluoromethane
- HFC-125 pentafluoroethane
- R410A a pseudo-azeotropic mixed working medium having a mass ratio of 1: 1 between HFC-32 and HFC-125
- HFC may cause global warming.
- R410A has been widely used for ordinary air-conditioning equipment called so-called package air conditioners and room air conditioners because of its high refrigerating capacity.
- GWP global warming potential
- the global warming potential (GWP) is as high as 2088, and therefore development of a low GWP working medium is required.
- HFO hydrofluoroolefins
- saturated HFC is referred to as HFC, and is used separately from HFO.
- HFC is specified as a saturated hydrofluorocarbon.
- halogenated hydrocarbons such as HFC and HFO, the abbreviations of the compounds are shown in parentheses after the compound names, but in the present specification, the abbreviations are used instead of the compound names as necessary.
- Patent Document 1 relates to a working medium using 1,1,2-trifluoroethylene (HFO-1123) which has the above-mentioned characteristics and provides excellent cycle performance. Technology is disclosed. In Patent Document 1, an attempt is made to use HFO-1123 in combination with various HFCs as a working medium in order to further improve the nonflammability and cycle performance of the working medium.
- HFO-1123 1,1,2-trifluoroethylene
- Non-Patent Document 1 reports an attempt to suppress the self-decomposition reaction by mixing HFO-1123 with other components such as vinylidene fluoride to reduce the content of HFO-1123. ing.
- Patent Document 2 proposes that HFO-1123 is used as a single working medium in a heat cycle system, and is used as a mixed working medium of HFO-1123 and HFC-32, or HFO-1123 and HFO-1234yf. Yes.
- hydrofluoroolefin such as HFO-1123
- ignition energy is applied in a state where the working medium is exposed to high temperature or high pressure due to abnormal operation or the like in a thermal cycle system
- the hydrofluoroolefin It should be noted that the self-decomposition reaction may occur.
- the place where there is a high possibility that a constant ignition energy is given to the working medium under high temperature and high pressure is mainly inside the compressor. If ignition energy is generated inside the compressor due to factors such as the occurrence of discharge (spark) at the power supply terminal, this ignition energy may be applied to the working medium to cause a self-decomposition reaction.
- an object of the present invention is to provide a compressor and a thermal cycle system that can prevent a spark from being generated from a power supply terminal in the compressor and prevent a self-decomposing reaction of a working medium.
- a compressor includes: A sealed container; A compression unit provided at an upper portion in the sealed container and compressing the working medium; An oil reservoir provided at the bottom of the sealed container for storing lubricating oil; An electric part provided between the compression part and the oil sump part in the sealed container, and driving the compression part; Provided through the wall surface in the region of the oil reservoir of the sealed container, can be connected to an external power source outside the sealed container, and is electrically connected to the motorized part in the sealed container via a lead wire And a power supply terminal connected to.
- a thermal cycle system has a working medium circuit to which the compressor is connected and in which a working medium containing HFO circulates.
- FIG. 1 is a cross-sectional view illustrating a configuration of an example of a compressor according to an embodiment of the present invention.
- FIG. 2 is a horizontal sectional view of the fixed spiral body and the swing spiral body.
- FIG. 3 is a diagram illustrating an example of an air conditioner that is an example of a heat cycle system according to an embodiment of the present invention.
- FIG. 1 is a sectional view showing an example of the configuration of a compressor 100 according to an embodiment of the present invention.
- the compressor of the present invention can be applied to various compressors including a scroll compressor and a rotary compressor as long as the compression unit is disposed above and the electric unit is disposed below. An example in which the machine is applied to a scroll compressor will be described.
- the compressor 100 includes a sealed container 10, a suction pipe 20, a discharge pipe 21, a compression unit 30, a shaft 40, an electric unit 50, and a power supply terminal 60.
- the sealed container 10 plays a role as a casing of the compressor 100, and houses the compression unit 30, the shaft 40, the electric unit 50, the power supply terminal 60, and the like.
- an oil reservoir 15 is formed at the bottom of the hermetic container 10 to store lubricating oil (refrigeration oil) 70.
- Lubricating oil 70 is slid on parts, bearings, and the like that constitute the compression portion 30 through an oil supply passage (not shown) provided in the shaft 40 so that the compression portion 30 can perform a smooth compression operation. Supplied.
- the oil sump portion 15 is provided with a power supply terminal 60 installed through an insulating member 62 so as to penetrate the sealed container 10.
- the power supply terminal 60 is a terminal for supplying power from an external power supply to the electric motor unit 50 in the sealed container 10, and includes an external terminal 61 and an internal terminal 63.
- the external terminal 61 is a terminal for receiving power supply from an external power source (not shown) outside the sealed container 10, and is provided outside the sealed container 10.
- the internal terminal 63 is a terminal for supplying power to the electric unit 50 and is provided in the sealed container 10.
- the internal terminal 63 is provided on the inner peripheral surface of the sealed container 10 in the region where the oil reservoir 15 is provided, and is immersed in the lubricating oil 70.
- the lubricating oil 70 having an extremely high insulating property is interposed between the terminals of the internal terminals 63, and the possibility of occurrence of sparks between the terminals can be eliminated.
- the suction pipe 20 is a pipe for sucking the working medium into the sealed container 10, and is provided on the side surface of the sealed container 10 so as to communicate with the inside and outside of the sealed container 10.
- the working medium in a gas state sucked into the sealed container 10 through the suction pipe 20 cools the electric unit 50 and is guided to the compression unit 30.
- the compression unit 30 plays a role of compressing the working medium sucked into the sealed container 10 to a predetermined pressure, and is provided above the electric unit 50.
- the structure of the compression unit 30 is not limited, and can be applied to the compression unit 30 having various structures as long as it is disposed above the electric unit 50. Therefore, it demonstrates as an example of the compression part 30 which can apply the compressor 100 which concerns on this embodiment here.
- the compression unit 30 includes a fixed scroll 31, an orbiting scroll 32, an Oldham ring 33, a frame 34, and a discharge pipe connection unit 35.
- the fixed scroll 31 is disposed at the upper portion
- the swing scroll 32 is disposed at the lower portion, and are provided so as to face each other.
- a frame 34 that houses the swing scroll 32 is provided below the swing scroll 32.
- a discharge pipe connecting portion 35 is provided above the fixed scroll 31.
- the Oldham ring 33 is provided below the swing scroll 32.
- a space is formed by respective spiral bodies, which will be described later, of the fixed scroll 31 and the orbiting scroll 32, and these are formed in a compression chamber A that becomes a sealed space and a suction chamber B that is in open communication with the sealed container 10. Become.
- the fixed scroll 31 and the swing scroll 32 cooperate to compress the working medium.
- the fixed scroll 31 includes a base plate 31a provided substantially horizontally, and a fixed spiral body 31b that stands vertically downward from the lower surface of the base plate 31a.
- the base plate 31 a is a flat plate-like member fixed in the sealed container 10, the outer peripheral surface is in contact with the inner peripheral surface of the sealed container 10, and the lower peripheral edge is in contact with the upper portion of the frame 34.
- a discharge port 31c through which the working medium compressed in the compression chamber A is discharged and a communication portion 31d capable of communicating with the discharge port 31c are formed at the center of the base plate 31a.
- the discharge port 31c is provided to extend in the vertical direction of the base plate 31a so that one communicates with the compression chamber A and the other communicates with the communication portion 31d.
- the discharge valve 31e is provided between the discharge port 31c and the communication portion 31d, and is attached so as to cover the discharge port 31c.
- the discharge valve 31e is in a state in which the discharge port 31c is closed while the pressure in the compression chamber A is smaller than a predetermined pressure (pressure in the communication portion 31d), and the working medium flows from the compression chamber A side to the discharge pipe 21.
- a predetermined pressure pressure in the communication portion 31d
- the pressure in the compression chamber A becomes equal to or higher than a predetermined pressure (pressure in the communication portion 31 d)
- the pressure is pushed up, the discharge port 31 c is opened, and the working medium is allowed to flow into the discharge pipe 21.
- the discharge pipe connection part 35 connects the discharge pipe 21 to the compression part 30, and plays a role of connecting the discharge pipe 21 and the communication part 31d.
- the discharge pipe 21 is a pipe for discharging the working medium compressed by the compression unit 30 from the sealed container 10 to the outside.
- the swing scroll 32 includes a substantially horizontal base plate 32a, a swing spiral body 32b formed upright from the upper surface of the base plate 32a, and a boss portion 32c extending downward from the lower surface of the base plate 32a.
- the base plate 32 a is made of a disk-shaped member, and is driven through a boss portion 32 c described later by the eccentric rotation of the eccentric portion 41 by the rotation of the shaft 40, and swings (rotates) in the frame 34.
- FIG. 2 is a horizontal sectional view of the fixed spiral body 31b and the swinging spiral body 32b.
- the fixed spiral body 31b and the swinging spiral body 32b are both formed in a spiral shape, that is, an involute curve shape, and are arranged to face each other.
- the rocking scroll body 32b of the rocking scroll 32 swings (turns) by the rotation of the shaft 40, and the working medium is compressed from the outside to the inside, The compressed working medium is discharged upward from the central discharge port 31c.
- the boss portion 32c has a hollow cylindrical shape formed on the lower surface of the base plate 32a.
- a cylindrical eccentric portion 41 provided at the upper end of the shaft 40 is accommodated in the boss portion 32c in a slidable state. That is, as the shaft 40 rotates, the orbiting scroll 32 is driven through the eccentric portion 41 accommodated in the boss portion 32c.
- the frame 34 confines the swing scroll 32 so as to be slidable. Therefore, a sliding surface is formed by the upper surface of the frame 34 and the lower surface of the base plate 32 a of the swing scroll 32.
- the frame 34 has a shape in which an upper part and a lower part are opened, and an upper part is provided with a base plate 31a of a fixed scroll 31 and is closed, and a shaft 40 and an eccentric part 41 are accommodated in the lower part.
- the outer peripheral surface is fixed to the inner peripheral surface of the sealed container 10.
- the Oldham ring 33 is provided below the lower surface of the base plate 32a of the orbiting scroll 32, and has a mechanism for preventing the rotation movement of the orbiting scroll 32 during the orbiting operation. Play a role to do.
- the compression chamber A is a space formed by the lower surface of the base plate 31a and the fixed spiral body 31b and the upper surface of the base plate 32a and the swinging spiral body 32b, and the number of spirals of the fixed spiral body 31b and the peristaltic spiral body 32b.
- a plurality of compression chambers A are formed as sealed spaces.
- the suction chamber B is formed at the distal end portions of the fixed spiral body 31b and the peristaltic spiral body 32b, and the inner surface of the frame 34, the outer peripheral portion of the base plate 32a, the fixed spiral body. It is formed by the inner peripheral surface 31B of 31b and the outer peripheral surface 32B of the swinging spiral body 32b, and is in a state of communicating with the sealed container 10.
- the suction chamber B is moved by the fixed spiral body 31b and the peristaltic spiral body 32b as the shaft 40 rotates.
- a confined space (compression chamber A) is formed and continuously compressed as the shaft 40 rotates.
- the electric unit 50 rotates the shaft 40 and drives the compression unit 30 by its output, and supplies power (energy) for compressing the working medium.
- the electric unit 50 includes a motor 51.
- the motor 51 is combined with a stator 53 fixedly supported on the hermetic container 10 and a rotor 52 attached to the shaft 40.
- the stator 53 is configured, for example, by attaching a multiphase stator winding 54 to a laminated iron core via an insulating member 55.
- the rotor 52 has, for example, a permanent magnet (not shown) inside, and is attached to the shaft 40 so that a predetermined gap is formed between the rotor 52 and the inner peripheral surface of the stator 53.
- the rotor 52 generates a rotating magnetic field inside the stator 53 when a current flows through the stator winding 54, and rotates the rotor 52, that is, the united shaft 40.
- the rotor 52 may be provided with a balancer 56 in order to suppress rotational imbalance associated with the movement of the orbiting scroll 32 and the Oldham ring 33.
- the current is supplied to the stator winding 54 via the lead wire 57.
- the lead wire 57 has one end connected to the stator winding 54 and the other end connected to the connector 58.
- the connector 58 is connected to the internal terminal 63 of the power supply terminal 60.
- a current flows through the stator winding 54 via the internal terminal 63 ⁇ the connector 58 ⁇ the lead wire 57.
- a subframe 11 is provided below the electric unit 50 so as to partition the space in the sealed container 10.
- a space serving as an oil sump 15 is formed in the lower part of the subframe 11 and has a structure for storing the lubricating oil 70.
- the subframe 11 is provided with a bearing 12 at the center thereof for rotatably supporting the lower end portion of the shaft 40, and further, a through hole 13 through which the lead wire 57 passes is provided at the peripheral portion. Yes.
- the through hole 13 is provided to enable power (current) to be supplied from the power supply terminal 60 provided at the lower portion of the subframe 11 to the motor unit 50, and allows the lead wire 57 to easily pass through. Is.
- the electric part 50 is provided between the compression part 30 and the oil sump part 15, that is, below the compression part 30 and above the oil sump part 15. With such an arrangement, the electric part 50 can be arranged close to the oil sump part 15.
- the power supply terminal 60 is a terminal provided to supply electric power (current) to the motor unit 50, and the internal terminal 63 is immersed in the lubricating oil 70 stored in the oil reservoir 15. It is provided as follows. Thereby, the electrical insulation of the internal terminal 63 can be improved, and it can prevent generating a spark from the internal terminal 63.
- FIG. Normally, the internal terminal 63 has a plurality of metal terminal exposed portions adjacent to each other, and the metal terminal exposed portions are provided adjacent to each other, so that sparks can be generated from the exposed metal terminal portions. It is in.
- the connector 58 and the lead wire 57 connected to the internal terminal 63 so as to be immersed in the refrigerating machine oil, the damage (insulation breakdown) of the coating of the lead wire 57 due to abnormal heat generation in the compressor is suppressed. In addition, the occurrence of sparks can be prevented.
- the internal terminal 63 is immersed in the lubricating oil 70, and the exposed portions of the adjacent metal terminals are configured to be in a highly insulating state by the lubricating oil. That is, the power terminal 60 is installed in the region of the oil reservoir 15 so that the internal terminal 63 is surely immersed in the lubricating oil 70.
- the connector 58 connected thereto at least a part of the lead wire 57 and the exposed portion of the metal terminal are naturally immersed in the lubricating oil 70, Suppression of these abnormal heat generation and electrical insulation can be improved as well.
- the power terminal 60 is provided above the subframe 11 and on the side surface of the sealed container 10 closest to the stator winding 54, the power terminal 60 is in a state in which it is easy to directly touch the gaseous working medium. Depending on the characteristics of the medium (dielectric constant, etc.), sparks may occur, and as a result, a self-decomposition reaction of the working medium may be induced.
- the internal terminal 63 is immersed in the lubricating oil 70, and the self-decomposition reaction of the working medium is extremely difficult to occur due to the high electrical insulating force of the lubricating oil 70. It is.
- the power terminal 60 may be provided at any location including the bottom surface of the hermetic container 10 as long as the exposed portion of the metal terminal of the internal terminal 63 is immersed in the lubricating oil 70. In consideration of direct placement, it is preferable to provide the airtight container 10 on the side surface. Thereby, the compressor 100 can be placed directly on the floor, and the connection work with the external power source and the installation of the compressor 100 can be facilitated.
- lubricating oil (refrigerating machine oil) 70 a known refrigerating machine oil used for a composition for a heat cycle system can be employed without particular limitation, together with a working medium made of a halogenated hydrocarbon.
- usable refrigerating machine oils include oxygen-containing refrigerating machine oils (ester refrigerating machine oils, ether refrigerating machine oils, etc.), fluorine refrigerating machine oils, mineral refrigerating machine oils, hydrocarbon refrigerating machine oils, and the like. Can be mentioned.
- the orbiting scroll 32 performs the orbiting motion by the orbiting motion of the eccentric portion 41 at the tip of the shaft 40, thereby forming a sealed space formed by the fixed spiral body 31 b and the peristaltic spiral body 32 b.
- the volume of (compression chamber A) decreases as the shaft 40 rotates.
- the gaseous working medium is sucked into the sealed container 10 from the suction pipe 20 while the swing scroll 32 is swinging.
- the sucked gaseous working medium is taken in through the suction chamber B constituting the compression section 30 and is compressed in the compression chamber A that becomes a sealed space as the shaft 40 rotates, and the pressure rises sequentially.
- the pressure in the compression chamber A exceeds a predetermined pressure (pressure in the communication portion 31d)
- the discharge valve 31e opens upward, and the working medium flows out from the discharge port 31c to the discharge valve 31e ⁇ the communication portion 31d, and the discharge pipe It is discharged to the outside of the sealed container 10 through 21.
- thermal cycle system according to the embodiment of the present invention will be described.
- the compressor 100 according to the present embodiment is used.
- FIG. 3 is a diagram illustrating an example of an air conditioner 150 that is an example of a thermal cycle system according to an embodiment of the present invention.
- the air conditioner 150 includes an outdoor unit 150a and an indoor unit 150b.
- the compressor 100 as a compression mechanism provided in the outdoor unit 150a, a four-way switching valve 154, an expansion unit
- An expansion valve 156 as a mechanism, an outdoor heat exchanger 157, and an indoor heat exchanger 155 provided in the indoor unit 150b are connected by piping to constitute a working medium circulation path 151.
- the outdoor heat exchanger 157 is provided with a fan 160
- the indoor unit 150b is provided with a fan 161
- the outdoor heat exchanger 157 and the indoor heat exchanger 155 function by blowing air from the fans 160 and 161, respectively. Then, heat exchange between the working medium circulating in the path 151 and the surroundings is performed.
- the air conditioner 150 can reverse the direction of circulation of the working medium by the switching operation of the four-way switching valve 154, and can perform cooling and heating operations.
- the air conditioner 150 includes a power supply device 172 such as an inverter power supply that supplies power to the compressor 100 and a control device 170 that controls the power supply device 172, and supplies power from the AC power supply 171 to the power supply device 172.
- a power supply device 172 such as an inverter power supply that supplies power to the compressor 100
- a control device 170 that controls the power supply device 172, and supplies power from the AC power supply 171 to the power supply device 172.
- the four-way switching valve 154 is set as shown by a solid line in FIG.
- the indoor heat exchanger 155 serves as a condenser and the outdoor heat exchanger 157 serves as an evaporator to operate the refrigeration cycle.
- the high-temperature and high-pressure working medium discharged from the compressor 100 passes through the four-way switching valve 154 (point d2 in FIG. 3), flows to the indoor heat exchanger 155, dissipates heat to the indoor air, and condenses (point d3 in FIG. 3). ).
- the condensed high-pressure working medium is decompressed by the expansion valve 156 to become a low-pressure working medium (point d4 in FIG. 3), and flows into the outdoor heat exchanger 157.
- the low-pressure working medium that has flowed into the outdoor heat exchanger 157 is in a gas-liquid mixed two-phase state (gas phase / liquid phase), easily absorbs heat and evaporates, absorbs heat from outdoor air, and evaporates.
- the evaporated low-pressure working medium returns to the compressor 100 through the four-way switching valve 154 through the point d1 in FIG.
- the suctioned low-pressure working medium is compressed and discharged again as a high-temperature and high-pressure working medium. By repeating this operation, the heating operation of the air conditioner 150 is performed.
- the flow path of the four-way switching valve 154 is changed (broken line in FIG. 3), the flow direction of the working medium is completely opposite to that of the heating operation, and the function of the heat exchanger is also opposite (the indoor heat exchanger 155). Is an evaporator, and the outdoor heat exchanger 157 is a condenser).
- the working medium used in the compressor 100 and the thermal cycle system according to the embodiment of the present invention may be a conventionally known working medium, but is preferably a working medium containing hydrofluoroolefin (HFO).
- HFO include trifluoroethylene (HFO-1123), 2,3,3,3-tetrafluoropropene (HFO-1234yf), 1,2-difluoroethylene (HFO-1132), 2-fluoropropene (HFO-1261yf).
- HFO-1243yc 1,1,2-trifluoropropene
- HFO-1225ye (E) trans-1,2,3,3,3-pentafluoropropene
- HFO-1225ye (E) cis-1,2,3,3 , 3-Pentafluoropropene
- HFO-1234ze (E) trans-1,3,3,3-tetrafluoropropene
- HFO-1234ze (Z) cis-1,3,3,3-tetrafluoropropene
- HFO-1243zf 3,3,3-trifluoropropene
- HFO-1234yf preferably comprising HFO-1234ze (E) or HFO-1234ze (Z), more preferably containing HFO-1234yf or HFO-1123, it is particularly preferred that it include a HFO-1123.
- the working medium used in the present invention preferably contains HFO-1123, and may further contain an optional component described later, if necessary.
- the content of HFO-1123 with respect to 100% by mass of the working medium is preferably 10% by mass or more, more preferably 20 to 80% by mass, still more preferably 40 to 80% by mass, and further preferably 40 to 60% by mass.
- HFO-1123 The characteristics of HFO-1123 as a working medium are shown in Table 1 particularly in a relative comparison with R410A (a pseudo-azeotropic mixed working medium having a mass ratio of HFC-32 and HFC-125 of 1: 1).
- the cycle performance is indicated by a coefficient of performance and a refrigerating capacity obtained by a method described later.
- the coefficient of performance and the refrigeration capacity of HFO-1123 are expressed as relative values (hereinafter referred to as the relative coefficient of performance and relative refrigeration capacity) with R410A as the reference (1.000).
- the global warming potential (GWP) is a value of 100 years indicated in the Intergovernmental Panel on Climate Change (IPCC) Fourth Assessment Report (2007) or measured according to the method. In this specification, GWP refers to this value unless otherwise specified.
- IPCC Intergovernmental Panel on climate Change
- the working medium used in the present invention preferably contains HFO-1123, and may optionally contain a compound used as a normal working medium in addition to HFO-1123 as long as the effects of the present invention are not impaired.
- a compound used as a normal working medium in addition to HFO-1123 examples include HFO other than HFC and HFO-1123 (HFC having a carbon-carbon double bond), other components that vaporize and liquefy together with HFO-1123 other than these, etc. Is mentioned.
- HFO other than HFC and HFO-1123 HFC having a carbon-carbon double bond
- an optional component for example, when used in a heat cycle in combination with HFO-1123, there is a compound capable of keeping the GWP and the temperature gradient within an allowable range while having the effect of further increasing the relative coefficient of performance and the relative refrigeration capacity. preferable.
- the working medium contains such a compound in combination with HFO-1123, a better cycle performance can be obtained while keeping the GWP low, and the influence of the temperature gradient is small.
- Temporal gradient When the working medium contains, for example, HFO-1123 and an optional component, it has a considerable temperature gradient except when the HFO-1123 and the optional component have an azeotropic composition.
- the temperature gradient of the working medium varies depending on the type of the optional component and the mixing ratio of HFO-1123 and the optional component.
- azeotropic or pseudo-azeotropic mixture such as R410A is preferably used.
- Non-azeotropic compositions have the problem of causing composition changes when filled from a pressure vessel to a refrigeration air conditioner. Furthermore, when the working medium leakage from the refrigerating and air-conditioning equipment occurs, the working medium composition in the refrigerating and air-conditioning equipment is very likely to change, and it is difficult to restore the working medium composition to the initial state. On the other hand, the above problem can be avoided if the mixture is azeotropic or pseudo-azeotropic.
- Temperature gradient is generally used as an index for measuring the possibility of using the mixture in the working medium.
- a temperature gradient is defined as the property of the start and end temperatures of a heat exchanger, for example, evaporation in an evaporator or condensation in a condenser, differing. In the azeotrope, the temperature gradient is 0, and in the pseudoazeotrope, the temperature gradient is very close to 0, for example, the temperature gradient of R410A is 0.2.
- the inlet temperature in the evaporator decreases, which increases the possibility of frost formation.
- a heat cycle system in order to improve heat exchange efficiency, it is common to make the working medium flowing through the heat exchanger and a heat source fluid such as water or air counter flow, and in a stable operation state Since the temperature difference of the heat source fluid is small, it is difficult to obtain an energy efficient thermal cycle system in the case of a non-azeotropic mixed medium having a large temperature gradient. For this reason, when a mixture is used as a working medium, a working medium having an appropriate temperature gradient is desired.
- the optional HFC is preferably selected from the above viewpoint.
- HFC is known to have higher GWP than HFO-1123. Therefore, the HFC combined with HFO-1123 is appropriately selected from the viewpoint of improving the cycle performance as the working medium and keeping the temperature gradient within an appropriate range, and particularly keeping the GWP within an allowable range. It is preferred that
- an HFC having 1 to 5 carbon atoms is preferable as an HFC that has little influence on the ozone layer and has little influence on global warming.
- the HFC may be linear, branched, or cyclic.
- HFC examples include HFC-32, difluoroethane, trifluoroethane, tetrafluoroethane, HFC-125, pentafluoropropane, hexafluoropropane, heptafluoropropane, pentafluorobutane, heptafluorocyclopentane, and the like.
- HFC 1,1-difluoroethane
- HFC-152a 1,1,1-trifluoroethane
- HFC-125 1,1,2,2-tetrafluoroethane
- HFC-132, HFC -152a, HFC-134a, and HFC-125 are more preferred.
- HFC may be used alone or in combination of two or more.
- the content of HFC in the working medium (100% by mass) can be arbitrarily selected according to the required characteristics of the working medium.
- the coefficient of performance and the refrigerating capacity are improved when the content of HFC-32 is in the range of 1 to 99% by mass.
- the coefficient of performance improves when the content of HFC-134a is in the range of 1 to 99% by mass.
- the preferred HFC GWP is 675 for HFC-32, 1430 for HFC-134a and 3500 for HFC-125. From the viewpoint of keeping the GWP of the obtained working medium low, the HFC-32 is most preferable as an optional HFC.
- HFO-1123 and HFC-32 can form a pseudo-azeotropic mixture close to azeotropy in a composition range of 99: 1 to 1:99 by mass ratio. The temperature gradient is close to zero. Also in this respect, HFC-32 is advantageous as an HFC combined with HFO-1123.
- the content of HFC-32 with respect to 100% by mass of the working medium is specifically preferably 20% by mass or more, and 20 to 80% by mass. % Is more preferable, and 40 to 60% by mass is further preferable.
- HFOs other than HFO-1123 may be used alone or in combination of two or more.
- the content of HFO other than HFO-1123 in the working medium (100% by mass) can be arbitrarily selected according to the required characteristics of the working medium.
- the coefficient of performance improves when the content of HFO-1234yf or HFO-1234ze is in the range of 1 to 99% by mass.
- composition range (S) A preferred composition range in the case where the working medium used in the present invention contains HFO-1123 and HFO-1234yf is shown below as a composition range (S).
- each formula showing the composition range (S) indicates the ratio (% by mass) of the compound with respect to the total amount of HFO-1123, HFO-1234yf, and other components (such as HFC-32). .
- the working medium in the composition range (S) has a very low GWP and a small temperature gradient.
- refrigeration cycle performance that can be substituted for the conventional R410A can be expressed.
- the ratio of HFO-1123 to the total amount of HFO-1123 and HFO-1234yf is more preferably 40 to 95% by mass, further preferably 50 to 90% by mass, and more preferably 50 to 85%. Mass% is particularly preferable, and 60 to 85 mass% is most preferable.
- the total content of HFO-1123 and HFO-1234yf in 100% by mass of the working medium is more preferably 80 to 100% by mass, further preferably 90 to 100% by mass, and particularly preferably 95 to 100% by mass. .
- the working medium used in the present invention preferably contains HFO-1123, HFC-32, and HFO-1234yf, and a preferred composition range (P) in the case of containing HFO-1123, HFO-1234yf, and HFC-32. Is shown below.
- each formula showing the composition range (P) the abbreviation of each compound indicates the ratio (mass%) of the compound with respect to the total amount of HFO-1123, HFO-1234yf, and HFC-32.
- the total amount of HFO-1123, HFO-1234yf, and HFC-32 specifically described is more than 90% by mass and less than 100% by mass with respect to the total amount of the working medium for heat cycle.
- the working medium having the above composition is a working medium in which the characteristics of HFO-1123, HFO-1234yf, and HFC-32 are exhibited in a well-balanced manner, and the defects possessed by each of them are suppressed.
- this working medium is a working medium that has a very low GWP, has a small temperature gradient, and has a certain capacity and efficiency when used in a thermal cycle, and can obtain good cycle performance.
- the total amount of HFO-1123 and HFO-1234yf with respect to the total amount of HFO-1123, HFO-1234yf, and HFC-32 is preferably 70% by mass or more.
- the working medium used in the present invention is more preferably composed of 30 to 70% by mass of HFO-1123 and 4 to 4% of HFO-1234yf with respect to the total amount of HFO-1123, HFO-1234yf, and HFC-32.
- Examples include a composition containing 40% by mass and HFC-32 in a proportion of 0 to 30% by mass, and the content of HFO-1123 with respect to the total amount of the working medium is 70 mol% or less.
- the working medium in the above range is a highly durable working medium in which the above effect is enhanced and the self-decomposition reaction of HFO-1123 is suppressed.
- the content of HFC-32 is preferably 5% by mass or more, and more preferably 8% by mass or more.
- the working medium used in the present invention contains HFO-1123, HFO-1234yf, and HFC-32.
- the content of HFO-1123 with respect to the total amount of the working medium is 70 mol% or less.
- the self-decomposition reaction of HFO-1123 is suppressed, and a highly durable working medium can be obtained.
- composition range (R) A more preferred composition range (R) is shown below.
- the working medium having the above composition is a working medium in which the characteristics of HFO-1123, HFO-1234yf, and HFC-32 are exhibited in a well-balanced manner, and the defects possessed by each of them are suppressed. That is, it is a working medium in which good cycle performance can be obtained by having a low temperature gradient and high performance and efficiency when used in a thermal cycle after GWP is kept low and durability is ensured.
- the working medium having the above composition is a working medium in which the characteristics of HFO-1123, HFO-1234yf, and HFC-32 are exhibited in a particularly well-balanced manner, and the disadvantages of each of them are suppressed. That is, it is a working medium in which GWP is kept low and durability is ensured, and when used in a thermal cycle, the temperature gradient is smaller and the cycle performance is higher by having higher capacity and efficiency. is there.
- composition range (M) a more preferred composition range (L) is shown below.
- the composition range (M) is more preferable.
- the working medium having the composition range (M) is a working medium in which the characteristics of the HFO-1123, HFO-1234yf, and HFC-32 are exhibited in a particularly well-balanced manner, and the drawbacks of the working medium are suppressed.
- this working medium has a GWP with an upper limit of 300 or less, and durability is ensured, and when used in a heat cycle, the temperature gradient is less than 5.8, and the relative coefficient of performance and relative This is a working medium having a refrigerating capacity close to 1 and good cycle performance.
- another working medium used in the present invention preferably contains HFO-1123, HFC-134a, HFC-125, and HFO-1234yf, and the combustibility of the working medium is suppressed by this composition.
- the working medium includes HFO-1123, HFC-134a, HFC-125, and HFO-1234yf, and the ratio of the total amount of HFO-1123, HFC-134a, HFC-125, and HFO-1234yf to the total amount of the working medium is 90%.
- the ratio of HFO-1123 to the total amount of HFO-1123, HFC-134a, HFC-125, and HFO-1234yf is 3% by mass or more and 35% by mass or less, and HFC-134a.
- the ratio of HFC-125 is preferably 4% by mass to 50% by mass
- the ratio of HFO-1234yf is preferably 5% by mass to 50% by mass.
- HFO-1123, HFC-134a, HFC-125, and HFO-1234yf and the ratio of the total amount of HFO-1123, HFC-134a, HFC-125, and HFO-1234yf to the total amount of the working medium is 90%.
- the ratio of HFO-1123 to the total amount of HFO-1123, HFC-134a, HFC-125, and HFO-1234yf is 6 mass% or more and 25 mass% or less, and HFC-134a. It is even more preferable that the ratio of HFC-125 is 20% by mass to 35% by mass, the ratio of HFC-125 is 8% by mass to 30% by mass, and the ratio of HFO-1234yf is 20% by mass to 50% by mass.
- the working medium used in the composition for a heat cycle system of the present invention may contain carbon dioxide, hydrocarbon, chlorofluoroolefin (CFO), hydrochlorofluoroolefin (HCFO) and the like in addition to the above optional components.
- CFO chlorofluoroolefin
- HCFO hydrochlorofluoroolefin
- Other optional components are preferably components that have little influence on the ozone layer and little influence on global warming.
- hydrocarbon examples include propane, propylene, cyclopropane, butane, isobutane, pentane, and isopentane.
- Hydrocarbons may be used alone or in combination of two or more.
- the working medium contains a hydrocarbon
- the content thereof is less than 10% by weight with respect to 100% by weight of the working medium, preferably 1 to 5% by weight, and more preferably 3 to 5% by weight. If a hydrocarbon is more than a lower limit, the solubility of the mineral refrigeration oil to a working medium will become more favorable.
- CFO examples include chlorofluoropropene and chlorofluoroethylene.
- CFO 1,1-dichloro-2,3,3,3-tetrafluoropropene (CFO-1214ya), 1 is easy to suppress the flammability of the working medium without greatly reducing the cycle performance of the working medium.
- CFO-1214yb 3-dichloro-1,2,3,3-tetrafluoropropene (CFO-1214yb) and 1,2-dichloro-1,2-difluoroethylene (CFO-1112) are preferred.
- CFO may be used alone or in combination of two or more.
- the working medium contains CFO
- the content thereof is less than 10% by weight with respect to 100% by weight of the working medium, preferably 1 to 8% by weight, and more preferably 2 to 5% by weight. If the CFO content is at least the lower limit value, it is easy to suppress the combustibility of the working medium. If the content of CFO is not more than the upper limit value, good cycle performance can be easily obtained.
- HCFO examples include hydrochlorofluoropropene and hydrochlorofluoroethylene.
- HCFO 1-chloro-2,3,3,3-tetrafluoropropene (HCFO-1224yd)
- 1-chloro can be used because flammability of the working medium can be easily suppressed without greatly reducing the cycle performance of the working medium.
- -1,2-difluoroethylene (HCFO-1122) is preferred.
- HCFO may be used alone or in combination of two or more.
- the content of HCFO in 100% by mass of the working medium is less than 10% by mass, preferably 1 to 8% by mass, and more preferably 2 to 5% by mass. If the content of HCFO is equal to or higher than the lower limit value, it is easy to suppress the combustibility of the working medium. If the content of HCFO is not more than the upper limit value, good cycle performance can be easily obtained.
- the total content of other optional components in the working medium is less than 10% by mass with respect to 100% by mass of the working medium, and 8% by mass. % Or less is preferable, and 5 mass% or less is more preferable.
- the compressor 100 and the thermal cycle system according to the embodiment of the present invention, even if the working medium is such that a self-decomposing reaction is likely to occur, the occurrence of the self-decomposing reaction due to the spark in the compressor 100 is prevented, The compression operation and the heat cycle operation can be performed stably.
- the scroll compressor has been described as an example of the compressor 100.
- the compression unit 30 is disposed in the upper part and the electric unit 50 is disposed in the lower part of the sealed container
- the present invention is applicable to various compressors. Is possible.
- the present invention can be suitably applied to a rotary compressor that includes a rotary piston, a cylinder, a vane, and the like and compresses a working medium by a rolling operation of the rotary piston.
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Abstract
Description
密閉容器と、
該密閉容器内の上部に設けられ、作動媒体を圧縮する圧縮部と、
前記密閉容器内の底部に設けられ、潤滑油を貯留する油溜め部と、
前記密閉容器内の前記圧縮部と前記油溜め部との間に設けられ、前記圧縮部を駆動する電動部と、
前記密閉容器の前記油溜め部の領域内の壁面を貫通して設けられ、前記密閉容器外で外部電源と接続可能であるとともに、前記密閉容器内で前記電動部にリード線を介して電気的に接続された電源端子と、を有する。
(HFO-1123)
HFO-1123の作動媒体としての特性を、特に、R410A(HFC-32とHFC-125との質量比1:1の擬似共沸混合作動媒体)との相対比較において表1に示す。サイクル性能は、後述する方法で求められる成績係数と冷凍能力とで示される。HFO-1123の成績係数と冷凍能力とは、R410Aを基準(1.000)とした相対値(以下、相対成績係数および相対冷凍能力という)で示す。地球温暖化係数(GWP)は、気候変動に関する政府間パネル(IPCC)第4次評価報告書(2007年)に示される、または該方法に準じて測定された100年の値である。本明細書において、GWPは特に断りのない限りこの値をいう。作動媒体が混合物からなる場合、後述するとおり温度勾配は、作動媒体を評価する上で重要なファクターとなり、値は小さい方が好ましい。
本発明で用いる作動媒体はHFO-1123を含むことが好ましく、本発明の効果を損なわない範囲でHFO-1123以外に、通常作動媒体として用いられる化合物を任意に含有してもよい。このような任意の化合物(任意成分)としては、例えば、HFC、HFO-1123以外のHFO(炭素-炭素二重結合を有するHFC)、これら以外のHFO-1123とともに気化、液化する他の成分等が挙げられる。任意成分としては、HFC、HFO-1123以外のHFO(炭素-炭素二重結合を有するHFC)が好ましい。
(温度勾配)
作動媒体が例えばHFO-1123と任意成分とを含有する場合、HFO-1123と任意成分とが共沸組成である場合を除いて相当の温度勾配を有する。作動媒体の温度勾配は、任意成分の種類およびHFO-1123と任意成分との混合割合により異なる。
(HFC)
任意成分のHFCとしては、上記観点から選択されることが好ましい。ここで、HFCは、HFO-1123に比べてGWPが高いことが知られている。したがって、HFO-1123と組合せるHFCとしては、上記作動媒体としてのサイクル性能を向上させ、かつ温度勾配を適切な範囲にとどめることに加えて、特にGWPを許容の範囲にとどめる観点から、適宜選択されることが好ましい。
<組成範囲(S)>
HFO-1123+HFO-1234yf≧70質量%
95質量%≧HFO-1123/(HFO-1123+HFO-1234yf)≧35質量%
組成範囲(S)の作動媒体は、GWPが極めて低く、温度勾配が小さい。また、成績係数、冷凍能力および臨界温度の観点からも従来のR410Aに代替し得る冷凍サイクル性能を発現できる。
<組成範囲(P)>
70質量%≦HFO-1123+HFO-1234yf
30質量%≦HFO-1123≦80質量%
0質量%<HFO-1234yf≦40質量%
0質量%<HFC-32≦30質量%
HFO-1123/HFO-1234yf≦95/5質量%
上記組成を有する作動媒体は、HFO-1123、HFO-1234yfおよびHFC-32がそれぞれ有する特性がバランスよく発揮され、かつそれぞれが有する欠点が抑制された作動媒体である。すなわち、この作動媒体は、GWPが極めて低く抑えられ、熱サイクルに用いた際に、温度勾配が小さく、一定の能力と効率を有することで良好なサイクル性能が得られる作動媒体である。ここで、HFO-1123とHFO-1234yfとHFC-32との合計量に対する、HFO-1123とHFO-1234yfとの合計量は70質量%以上であることが好ましい。
<組成範囲(R)>
10質量%≦HFO-1123<70質量%
0質量%<HFO-1234yf≦50質量%
30質量%<HFC-32≦75質量%
上記組成を有する作動媒体は、HFO-1123、HFO-1234yfおよびHFC-32がそれぞれ有する特性がバランスよく発揮され、かつそれぞれが有する欠点が抑制された作動媒体である。すなわち、GWPが低く抑えられ、耐久性が確保されたうえで、熱サイクルに用いた際に、温度勾配が小さく、高い能力と効率を有することで良好なサイクル性能が得られる作動媒体である。
0質量%<HFO-1234yf≦40質量%
30質量%<HFC-32≦75質量%
上記組成を有する作動媒体は、HFO-1123、HFO-1234yfおよびHFC-32がそれぞれ有する特性が特にバランスよく発揮され、かつそれぞれが有する欠点が抑制された作動媒体である。すなわち、GWPが低く抑えられ、耐久性が確保されたうえで、熱サイクルに用いた際に、温度勾配がより小さく、より高い能力と効率を有することで良好なサイクル性能が得られる作動媒体である。
<組成範囲(L)>
10質量%≦HFO-1123<70質量%
0質量%<HFO-1234yf≦50質量%
30質量%<HFC-32≦44質量%
<組成範囲(M)>
20質量%≦HFO-1123<70質量%
5質量%≦HFO-1234yf≦40質量%
30質量%<HFC-32≦44質量%
上記組成範囲(M)を有する作動媒体は、HFO-1123、HFO-1234yfおよびHFC-32がそれぞれ有する特性が特にバランスよく発揮され、かつそれぞれが有する欠点が抑制された作動媒体である。すなわち、この作動媒体は、GWPの上限が300以下に低く抑えられ、耐久性が確保されたうえで、熱サイクルに用いた際に、温度勾配が5.8未満と小さく、相対成績係数および相対冷凍能力が1に近く良好なサイクル性能が得られる作動媒体である。
(その他の任意成分)
本発明の熱サイクルシステム用組成物に用いる作動媒体は、上記任意成分以外に、二酸化炭素、炭化水素、クロロフルオロオレフィン(CFO)、ヒドロクロロフルオロオレフィン(HCFO)等を含有してもよい。その他の任意成分としてはオゾン層への影響が少なく、かつ地球温暖化への影響が小さい成分が好ましい。
15 油溜め部
20 吸入管
21 吐出管
30 圧縮部
31 固定スクロール
32 揺動スクロール
40 軸
50 電動部
51 モータ
52 ロータ
53 ステータ
57 リード線
58 コネクタ
60 電源端子
61 外部端子
62 絶縁部材
63 内部端子
70 潤滑油
100 圧縮機
150 空気調和装置
Claims (8)
- 密閉容器と、
該密閉容器内の上部に設けられ、作動媒体を圧縮する圧縮部と、
前記密閉容器内の底部に設けられ、潤滑油を貯留する油溜め部と、
前記密閉容器内の前記圧縮部と前記油溜め部との間に設けられ、前記圧縮部を駆動する電動部と、
前記密閉容器の前記油溜め部の領域内の壁面を貫通して設けられ、前記密閉容器外で外部電源と接続可能であるとともに、前記密閉容器内で前記電動部にリード線を介して電気的に接続された電源端子と、を有する圧縮機。 - 前記電源端子は、前記密閉容器内に金属端子露出部分を有し、
該金属端子露出部分は、前記潤滑油に浸漬される請求項1に記載の圧縮機。 - 前記リード線は前記電源端子にコネクタで接続され、前記コネクタ及び前記リード線の少なくとも一部は前記潤滑油に浸漬される請求項1又は2に記載の圧縮機。
- 前記電源端子は、前記密閉容器の前記油溜め部の領域内の前記壁面のうち、前記密閉容器の側面に設けられた請求項1乃至3のいずれか一項に記載の圧縮機。
- 前記作動媒体は、ハイドロフルオロオレフィン(HFO)を含む作動媒体である請求項1乃至4のいずれか一項に記載の圧縮機。
- 前記HFOは、HFO-1123を含む請求項5に記載の圧縮機。
- 前記作動媒体は、HFO-1123の単独作動媒体、HFO-1123とHFC-32との混合作動媒体、又はHFO-1123とHFO-1234yfとの混合作動媒体である請求項6に記載の圧縮機。
- 請求項1乃至7のいずれか一項に記載の圧縮機が接続され、前記作動媒体が循環する冷媒回路を有する熱サイクルシステム。
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CN201780012542.2A CN109072900B (zh) | 2016-02-22 | 2017-02-03 | 压缩机和热循环系统 |
EP17756154.5A EP3421798B1 (en) | 2016-02-22 | 2017-02-03 | Compressor and heat cycle system |
JP2018501111A JP6922885B2 (ja) | 2016-02-22 | 2017-02-03 | 圧縮機及び熱サイクルシステム |
US16/106,306 US10418876B2 (en) | 2016-02-22 | 2018-08-21 | Compressor and heat cycle system for refrigerator |
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EP (1) | EP3421798B1 (ja) |
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EP3421798A4 (en) | 2019-10-23 |
US20180358861A1 (en) | 2018-12-13 |
CN109072900B (zh) | 2020-11-10 |
US10418876B2 (en) | 2019-09-17 |
JPWO2017145712A1 (ja) | 2018-12-20 |
JP6922885B2 (ja) | 2021-08-18 |
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